Steve Stevens' old jersey number from his football-playing days at Michigan State is 22. His nickname was "Stiffy."
Ren notes that she can't audition for the Arts Conservatory because the tryouts are only for seventh and eighth-graders. This is the first indication we have gotten that Ren is in the ninth grade this year. During the first two seasons, many references were made to her being in the eighth grade and Louis being in the seventh. Consequently, Louis must be an eighth-grader this season.
The song that Tom Gribalski is singing for his addition is called "I Want a Girl (Just Like the Girl That Married Dear Old Dad)" by Harry Von Tilzer and William Dillon.